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3 years ago

Eli writes this equation 3/6 + 4/5 = 7/11. Which inequality proves that Eli’s result is incorrect

Mathematics

2 answers:

Firlakuza [10]3 years ago

6 0

He added the numerator and the denominator together.

The correct answer should been 1 3/10 or (1.3)

Minchanka [31]3 years ago

3 0

Answer:

I agree with the dude above he is correct

Step-by-step explanation:

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A recent article in a college newspaper stated that college students get an average of 7 hrs of sleep each night. A student who

vazorg [7]

Solution -

A student who was skeptical about this value decided to conduct a survey by randomly sampling 36 students. On average, the sampled students slept 6.6 hours per night.

The sample mean is the average of the 36 sampled students, which is 6.6 hours. So 6.6 represents the sample mean.

College newspaper stated that college students get an average of 7 hrs of sleep each night.

The claimed population mean is the stated average from the newspaper article, which is 7 hrs. So 7 represents the claimed population mean.

6 0

3 years ago

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is kno

fomenos

Answer: a. 19.200 to 20.800

Step-by-step explanation:

Formula to find the confidence interval $(\mu)$ :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

, where n is the sample size

$\sigma$ = Population standard deviation.

$\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Two tailed z-value for significance level of $\alpha$ .

Given : Confidence level = 95.44% = 0.9544

Significance level = $\alpha=1-0.9544=0.0456$

Using standard normal z-value table ,

Two tailed z-value for Significance level of 0.0456 :

$z_{\alpha/2}=z_{0.0228}=1.999\approx2$

Also,

n=144

$\sigma= 4.8$

$\overline{x}=20$

Then, the required 95.44% confidence interval for the population mean :-

$20\pm (2)\dfrac{4.8}{\sqrt{144}}\\\\ =20\pm (0.800)\\\\=(20-0.800,\ 20+0.800)=(19.200,\ 20.800)$

Hence, the 95.44% confidence interval for the population mean is 19.200 to 20.800.

8 0

3 years ago

Find each sum. (-3)+2

iren2701 [21]

Hope this will help

4 0

3 years ago

Read 2 more answers

What is the length of the radius, r? 6 18 36 72

Alchen [17]

Answer:

Step-by-step explanation:

5 0

3 years ago

To lease a new car, you must make a down payment when you sign the lease, then pay $199 per month. Six months after signing his

stellarik [79]

The solution for this problem is:

Let x be the number of months; and

Let y be the amount paid

We know that m is $199 per month and the two other given are 6 months and 2694.

y = 199 (x -6) + 2694

y = 199 (36 -6) + 2694

y = 199 (30) + 2694

y = 8664

Mr. Scott paid $8664 after 3 years.

4 0

3 years ago